Means for intermittently rotating tables.



H0. 823,249. PATENTBD JUNE 12, 1906.

H. G. WULFF. MEANS FOR INTERMITTENTLY ROTATING TABLES.

APPLICATION FILED JULY 26, 1905.

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UNITED STATES PATENT OFFICE.

HEINRICH GERHARD WULFF, OF EILENBURG, GERMANY.

MEANS FOR INTERMITTENTLY ROTATING TABLES.

Specification of Letters Patent.

Patented June 12, 1906.

To all whom it may concern:

Be it known that I, HEINRICH GERHARD WULFF, a subject of the King of Prussia, German Emperor, residing at Eilenburg, Prussia, Germany, have invented a new and useful Improved Means for intermittently Rotating Tables, of which the following is a full, clear, and exact specification.

The present invention relates to means for intermittently .rotating tables, principally such as are used in connection with machinetools, and more particularly with machines for pressing artificial stones and the like; and the invention consists of the details of construction hereinafter set forth, and particularly pointed out in the claims.

In order to render the present specification easily intelligible, reference is had to the accompanying drawings, in which similar letters of reference denote similar parts throughout the several views.

Figure 1 is a side elevation of the device Fig. 2, a plan; and Fig. 3, a part side elevation, partly in section.

The table a to be intermittently rotated is mounted to rotate loosely on the shoulder of a vertical shaft 0, on which it rests with the hub 17. Loosely mounted and supported in the vertical direction on the larger part of the said shaft 0, beneath the table a, is an arm 6, to the free end of which is attached, by means of a universal joint g, one end of a connecting-rod 7c, the other end of which is connected to the crank-pin h of a crank-disk i. Arranged in a circle the center of which coincides with the center of the shaft 0 on the under side of the table a is a series of ratchet-like recesses d, the forward ends of which are out vertically into the under side of the table, while the rear ends taper gradually oif toward the un der surface of the said table. These notches are made at a distance apart corresponding to the stroke of the rod is, or approximately so, and to the stroke the table is to make at each intermittent movement. In the upper face of the end of the arm e an upwardlyspring-pressed coupling-pin f is provided, which is adapted to be normally sprin pressed against the under surface of the tab e and is arranged at a radius corresponding to that of the center line of all the ratchetnotches d.

The operation of the device is very simple. When the crank-disk i is rotated, the arm e Will be rocked by the connecting-rod is to an extent corresponding to the double throw of the crank-pin h. The coupling-pin f, being in engagement with the vertical end of one of the notches (1 when the arm e is at the commencement of its stroke will obviously pull the table round by the action of the rod is and the universal joint 9 until the crank-pin has performed its full stroke, when the table will be arrested by any suitable known means and the arm e commences its return stroke, the coupling-pin f sliding gradually out of the notch in which it has been and compressing its spring. It Will then slide along the under surface of the table until the arm e has completed its stroke backward, when it willspring into the next notch d at the rear and again pull the table round the desired distance.

Obviously the pin might be actuated by a weight instead of the spring, as illustrated.

By means of the present invention the means for intermittently rotatin atable are very considerably simplified, and a comparatively long travel at each movement may be attained without havingto employ long guideways and operating-arms, as has hitherto been the case.

I claim- 1. A device for intermittently rotating a pivotally-supported table having ratchetike depressions, said device comprising an arm loosely mounted on the pivot of the table, a crank-disk, a connecting-rod attached to said disk, a universal-joint connection between said arm and said connectingrod, and means on the free end of the arm to engage with the aforesaid ratchet-like depressions and move the table at each reciprocation of the said arm.

2. A device for intermittently-rotating a pivotally-supported table having ratchetlike depressions, said device comprising an arm loosely mounted on the pivot of the table, a crank-disk, a connecting-rod attached to said disk, a universal-joint connection between said arm and said connectingrod, and a spring-pressed pin mounted on the free end of the arm to engage with the aforesaid ratchet-like depressions and move the table at each reciprocation of the said arm substantially as described.

In testimony whereof I afiix my signature in the presence of two witnesses MORITZ LEssNER,

RUDOLPH FRIOKE. 

